Hydroxyethyl Cellulose (HEC)o se vai-soluble nonionic cellulose ether, lea e masani ona faaaoga i coatings, mea faufale, vailaau, vailaau i aso taitasi ma isi fanua. Ae ui i lea, o le HEC e maualuga le solubility i le vai ma vaivai le hydrophobicity, lea e mafai ona oʻo atu ai i faʻatapulaʻa faʻatinoga i nisi faʻataʻitaʻiga faʻaoga. O le mea lea, o le hydrophobically modified hydroxyethyl cellulose (HMHEC) na oʻo mai i le faʻaleleia o ana meatotino rheological, mafiafia gafatia, mautu emulsification ma vai tetee.
1. Le taua o le hydrophobic suiga ole hydroxyethyl cellulose
Faʻaleleia mea faʻamalo ma mea faʻapitoa
Ole suiga ole Hydrophobic e mafai ona fa'aleleia atili ai le mafiafia ole HEC, ae maise ile maualalo ole fua. E faʻaalia ai le maualuga o le viscosity, lea e fesoasoani e faʻaleleia ai le thixotropy ma le pseudoplasticity o le tino. O lenei meatotino e sili ona taua i le fanua o faʻaofuofu, suauʻu suauʻu vili vai, oloa tausiga a le tagata lava ia, ma isi, ma e mafai ona faʻaleleia le mautu ma le faʻaogaina o le aʻafiaga o le oloa.
Fa'aleleia le mautu o le emulsion
Talu ai ona o le HEC ua suia e mafai ona fausia ai se fausaga faʻafesoʻotaʻi i le vai vaifofo, e faʻaleleia atili ai le mautu o le emulsion, e mafai ona faʻaitiitia le vavaeeseina o le suauu-vai, ma faʻaleleia le aafiaga o le emulsification. O le mea lea, o loʻo i ai le aoga tele o le faʻaogaina i totonu o fanua o faʻamaʻi emulsion, oloa tausiga paʻu ma meaʻai emulsifiers.
Faʻaleleia le faʻafefe o le vai ma mea e fai ai ata
O le HEC masani e maualuga le hydrophilic ma faigofie ona solu i totonu o siosiomaga maualuga maualuga poʻo vai, lea e aʻafia ai le vai faʻafefe o mea. E ala i le fesuiaiga o le hydrophobic, e mafai ona faʻaleleia lona faʻaogaina i paʻu, faʻapipiʻi, faʻapipiʻi pepa ma isi fanua, ma e mafai ona faʻaleleia le faʻaleleia o le vai ma mea e fai ai ata.
Fa'aleleia mea e fa'amama fa'afefete
Hydrophobic-modified HEC e mafai ona faʻaitiitia le viscosity i lalo o tulaga maualuga o le shear, aʻo faʻatumauina le maualuga maualuga i le maualalo o fua faʻatatau, faʻaleleia le faʻatinoina o le fausiaina ma faʻaitiitia ai le malosi. E taua tele i alamanuia e pei o le la'uina o suau'u ma faufale faufale.
2. Suiga Hydrophobic o le hydroxyethyl cellulose
HEC hydrophobic suiga e masani lava ona ausia e ala i le faʻaofiina o vaega hydrophobic e fetuutuunai lona solubility ma mea mafiafia e ala i vailaʻau sulu poʻo suiga faaletino. Ole auala masani ole suiga ole hydrophobic e fa'apea:
Fa'apipi'i vaega o le Hydrophobic
Fa'ailoaina o le alkyl (pei o le hexadecyl), aryl (pei o le phenyl), siloxane po'o vaega fa'afefeteina i luga o le mole HEC e ala i vaila'au e fa'aleleia ai lona hydrophobicity. Faataitaiga:
Fa'aaogaina o le esterification po'o le etherification fa'afofoga e sulu ai le alkyl filifili umi, e pei o le hexadecyl po'o le octyl, e fausia ai se fausaga fa'afeso'ota'i hydrophobic.
Fa'ailoa vaega silikoni e ala i le siloxane fa'aleleia e fa'aleleia ai lona fa'afefe vai ma lubricity.
Faʻaaogaina le fesuiaiga o le fluorination e faʻaleleia ai le tetee o le tau ma le hydrophobicity, e faʻaogaina ai mo faʻaofuofu maualuga poʻo faʻaoga faʻapitoa tau siosiomaga.
Copolymerization poʻo le faʻaogaina o fesoʻotaʻiga
E ala i le faʻaofiina o comonomers (e pei o acrylates) poʻo sui faʻafesoʻotaʻi (e pei o resins epoxy) e fausia ai se fesoʻotaʻiga fesoʻotaʻiga, e faʻaleleia le malosi o le vai ma le mafiafia ole HEC. Mo se faʻataʻitaʻiga, o le faʻaaogaina o le HEC ua suia ile hydrophobically i polymer emulsions e mafai ona faʻaleleia ai le mautu ma le mafiafia o le emulsion.
Suiga faaletino
I le faʻaaogaina o le faʻaogaina o luga poʻo le faʻaogaina o tekonolosi, o molelaʻau hydrophobic o loʻo ufiufi i luga ole HEC e fausia ai se hydrophobicity. O lenei metotia e fai si malu ma talafeagai mo talosaga e maualuga manaʻoga mo vailaʻau mautu, e pei o meaʻai ma vailaʻau.
Suiga fa'atasi o le Hydrophobic
E ala i le faʻaofiina o se vaega laʻititi o vaega hydrophobic i luga o le mole HEC, e fausia ai se faʻapipiʻi tuʻufaʻatasia i le vaifofo vai, ma faʻaleleia atili ai le malosi faʻafefe. O lenei metotia e masani ona faʻaaogaina i le atinaʻeina o faʻamaufaʻailoga maualuga ma e talafeagai mo paʻu, vailaʻau suauu ma isi fanua.
Suiga Hydrophobic ohydroxyethyl celluloseo se auala taua e faʻaleleia ai lona faʻatinoga o le faʻaaogaina, lea e mafai ona faʻaleleia ai lona gafatia mafiafia, faʻamautu o le emulsification, faʻafefe vai ma meatotino rheological. O auala masani o suiga e aofia ai le su'iina o vaega hydrophobic, copolymerization poʻo le faʻafesoʻotaʻi fesoʻotaʻiga, suiga faʻaletino ma le faʻaogaina o asosi hydrophobic. Filifiliga talafeagai o metotia faʻaleleia e mafai ona faʻamalieina le faʻatinoga o le HEC e tusa ai ma manaʻoga faʻaoga eseese, ina ia sili atu le sao i le tele o faʻalapotopotoga e pei o faʻailoga fausaga, vailaʻau suauʻu, tausiga a le tagata lava ia, ma vailaʻau.
Taimi meli: Mati-25-2025